Eye doctor in Luperon, I don't know.
But you have an excellent dentist in Luperon : Dra E. FELIPE 809 276 1453.
For the eye doctor I go to Dr Carlos Juan BURROUGHS (cirujano oftalmologo) at Centro Mediacal Bournigal in Puerto Plata. He is really excellent, friendly and I think he can speak English but am not sure.